B.) 8 x 4 x 18" 2 Mil (1000/Case)-- Side gussets provide extra room for irregularly shaped items. â€¢ Bags feature expandable sides and a fitted bottom. â€¢ Clear bags meet FDA and USDA requirements. â€¢ Dimensions listed are the interior usable space of the bag. â€¢ Close bags with twist ties, bag tape or impulse sealers.